Page 11 - Bosch Boiler House Component

Boiler house components | 11

Blow-down, expansion and Expansion and
cooling module BEM heat recovery module EHM

The purpose of the blow-down, expansion and cooling The module recovers a substantial amount of the heat
module BEM is the intake of all hot waste water of a quantity contained within the hot water (desalting
steam boiler system. This waste water is collected, ex- water/condensate) of a boiler system. In the expansion
panded and cooled down to the permitted, set dis- tank the water that is under pressure is expanded. The
charge temperature. The module is designed for multi- expansion steam produced thereby supports the heat-
boiler systems with a max. of three steam boilers. ing of the feed water tank. In the downstream heat
exchanger the make-up water of the boiler system is
Construction preheated and the desalting water/condensate is
A closed, upright container mounted on a supporting cooled to a temperature of approx. 35 °C.
structure, with various feed and drain connections.
The lower half of the module is filled with water during Construction
operation, the upper half is expansion space. The The module comprises an expansion tank, an inte-
prevailing media temperature is recorded and con- grated heat exchanger for heat recovery, the support-
verted to an electrical signal with the temperature ing structure and the necessary equipment.
measuring transducer in the lower part of the module.
Mixed cooling is achieved by the supply of cold, sof- Equipment level
tened make-up water and the waste water is safely The module is offered thermally insulated and fully
drained off when the permitted discharge tempera- assembled ex works with all necessary fittings.
ture is reached. The discharge temperature can be
controlled by the control system of the water service Benefits at a glance:
module.  Quick and easy assembly, ready for immediate
operation with few connections
Equipment level  Increase in efficiency of the system
The module comprises a vertical cylinder sealed with  Reduction of the fuel, cooling water
plates at both ends and a protection against contact. It and waste water costs
is offered thermally insulated and fully assembled ex
works with all necessary fittings.

Benefits at a glance:
 Quick and easy assembly, ready for immediate
operation with few connections
 Exact compliance with official guidelines thanks to
automatic operating mode